Ecology: Evolution
02/13/2017
What is Evolution? Evolution is descent with modification
Differences accumulate over time. Few species differ from ancestors,
but also resemble them.
Evolution is a change in allele frequency.
Alleles: different forms of th

Ecology chapter 7
02/16/2017
Chapter 7 and 8
Life histories
Anadromous Life Cycle of Atlantic Salmon
Born in salt water
The timing and nature of life history event shapes the overall life cycle
of an organism. A species life history strategy is the overal

Principles of Ecology Population Dynamics
03/02/2017
Population dynamics: The patterns of change in abundance within
populations over time
Populatiokns size changes as a result of four processes: Birth, death,
immigration, and emigration
N(t+1) = N(t) +B

Uses of Adaptation in Evolutionary Biology
A character, or trait, that originated and evolved due to natural
selection.
Here, adaptation refers to a structure or function that is the result of the Darwinian
process of adaptation. For example, sweat glands

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You can never do just one thing!
The Web of Life
Evolution matters!
Nothing in biology makes sense
except in light of evolution!
Space matters!
1
CONCEPTS
Events in the natural world are
interconnected.
Ecology is the scientific study of
interactions be

Mutualism and
Commensalism
The fungus-growing ants started cultivating
fungi for food at least 50 million years
before the first human farmers.
Figure 14.2 The Fungal Garden of a Leaf-cutter Ant
90% of worlds plant
species rely on
animal pollinators
The N

What is the biosphere?
Biosphere: the thin zone of life on Earth between
lithosphere and troposphere; comprised of all
ecosystems; organisms plus their environments
Chapter 3 The Biosphere
Terrestrial biomes
Characterized by growth forms of dominant veget

3
The Biosphere
What is the biosphere?
Biosphere: the thin zone of life on Earth between
lithosphere and troposphere; comprised of all
ecosystems; organisms plus their environments
Chapter 3 The Biosphere
Terrestrial biomes
Characterized by growth forms o

Lecture 8 17 February 2014 Chapter 6
Evolution and Ecology
Evolutionary diversification is influenced by ecological interactions
between organisms and their biotic and abiotic environments.
Evolution is a change in allele frequency
Alleles: different form

Ecology
02/18/2017
Chapter 4
PHYSIOLOGICAL ECOLOGY
CONCEPT 4.1 Each species has a range of environmental tolerances
that determines its potential geographic distribution
Response to Environmental Variation
CONCEPT 4.2 The temperature of organisms is deter